What a Frisco Pool Looks Like in March When Nobody Touched It All Winter

Two things are waiting for you in March on a pool that went dark over the winter: cracked equipment that sprays water the moment you turn it on, and a green pool — even if you were dropping chemicals in all winter. Both are predictable, both cost more to fix than the service you cancelled, and the second one surprises people the most, because they were adding chemicals. The problem is that chemicals were never the thing winter was going to take from them.

Problem One: The Equipment Cracked and You Don't Know Yet

If the pool sat through a freeze with no one watching the equipment, the pad took damage. Water expands about 9% when it freezes, and inside a sealed pump body or heater manifold that is enough to split the housing.

What we find on spring startups: cracked pump bodies, cracked valves, and cracked manifolds on both the heater and the filter. The pool looks fine. The pad looks fine. Then the pump gets switched on for the first time in months and water starts shooting out of the equipment.

This is the part that makes winter neglect expensive rather than just ugly. A green pool is a recovery job. A cracked pump, a cracked filter manifold, and a cracked heater header is an equipment-replacement bill — and it arrives all at once, in spring, right when you want to use the pool.

Nobody was there to confirm freeze protection was running. Nobody was there when the power went out during a cold snap and the freeze protection stopped working. Nobody drained the equipment. So it cracked.

Problem Two: It's Green Anyway — Even Though You Added Chemicals

This is the one homeowners argue with us about, and it's worth understanding, because it explains why "I'll just dump chemicals in myself over winter" doesn't work.

Here's the chain:

Leaves and debris fall in all autumn and winter. In Frisco that's months of organic material — leaves, twigs, dirt, pollen, whatever blows in — accumulating in the water and settling on the bottom.

That debris releases phosphates as it breaks down. Phosphates are a nutrient. They are, functionally, algae food.

Algae eats the phosphates and blooms. And this is the key part: you can have chemicals in the water and still go green, because you're fighting a nutrient load that keeps getting replenished by decomposing debris. Adding chlorine to a pool full of rotting leaves is pouring sanitizer into something that's actively generating algae fuel faster than the chemicals can keep up.

No circulation makes it worse. Pump off or running on a reduced winter schedule means chemicals aren't distributing and nothing is being filtered out. The debris just sits there feeding the bloom.

So in March the pool is green, the owner is frustrated because they did add chemicals, and the actual cause was never chemistry. It was months of debris nobody removed.

What That Spring Bill Looks Like

Add it up and winter neglect typically produces:

What happened	What it costs to undo
Cracked pump body	Replacement — epoxy doesn't hold on a cracked pump
Cracked filter manifold	Replacement; a cracked filter housing shouldn't be run
Cracked heater manifold/header	Repair or replacement
Green pool from phosphate load	Green-to-clean recovery, from $399
Filter clogged with months of debris	Filter clean, $130

Compare that against what the winter months of service would have cost. The math almost never favors going dark — and the equipment damage is the line item people forget to include when they're deciding.

The Honest Version: You Don't Have to Keep Weekly

Here's the part most pool companies won't say, so we will: if you want to spend less over the winter, you don't have to keep paying for weekly service. Winter demand genuinely is lower — the heat is gone, evaporation slows, and algae pressure drops.

What you can't do is have nobody looking at it, because the two problems above don't come from skipping a cleaning. They come from nobody clearing the debris and nobody watching the equipment through a freeze.

So the sensible winter move is to step down, not to go dark:

• Bi-weekly keeps someone clearing debris before it decomposes into a phosphate load, and keeps eyes on the equipment pad every two weeks through freeze season.
• Chemical-only is the floor if you're happy to handle the physical cleaning yourself — we manage the water and still inspect the equipment, you handle the skimming and brushing.

Either one costs less per month than weekly and still prevents the spring bill. Dropping a tier for the winter is a conversation we have with customers every October, and we'd much rather do that than clean up a swamp with a cracked pad in March. If you want to change plans for the cold months, just tell us — the plan tiers are on our pricing page and there's no contract either way.

If You Already Went Dark This Winter

If the pool's been unattended and you're reading this partway through the cold season, two things worth doing now rather than in spring:

1. Get the debris out. Every week of decomposition adds to the phosphate load you'll be fighting later. Even one cleanout materially reduces how bad the spring bloom gets.
2. Check the equipment before you run it. Don't just flip the pump on. Look for cracks in the pump body, valves, filter housing, and heater first. Running a freeze-cracked filter is a genuine safety problem, not just a leak.

A pool that went dark isn't a lost cause. But it's a lot cheaper to interrupt the process in January than to inherit the whole result in March.

---

Hydra Pool Services keeps Frisco pools maintained through winter — at whatever service level makes sense for the season. Start your free 2-week trial →